| http://www.w3.org/ns/prov#value | - tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C???); wherein R10 and R11 are each independently a hydrocarbon group selected from the group consisting of an alkyl, alkenyl and aryl group having 1 to 10 carbon atoms, in the case where R10 or R11 is an aryl group, the aryl group forms a condensed ring together with a cyclopentadienyl ring; wherein m=0-4; wherein n=0-4; wherein R12 and R13 are each
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